Hi Hope I am not too bothersome with that topic...
Unfortunately, Sextante 1.09 was hidden in my OSGeo4W installation behind the old 1.07, so it took me a while to find the "advanced parameters". Actually, both Sextante versions were installed in parallel, which I was not aware of (neither the fact that allways only the old version was loaded). Now I reinstalled QGIS and QGIS-dev with Sextante 1.1, created a polygon layer with overlapping and not adjacent digitised boundaries (to be snapped), and ran some tests: Indeed, the advanced import parameters in Sextante 1.1 do the trick. However, I can confirm Bernds findings in that sense, that the advanced import parameters (especially snapping) in the v.in.ogr-part worked well, while using the default settings for v.in.ogr combined with snapping with exactly the same distance as in the earlier test in v.clean did not (though that is maybe a GRASS issue). Furthermore, different from what I and Paolo expected overlapping areas are beeing preserved in the Sextante output. I guess that is because Sextante uses "type=auto" in the v.out.ogr-part. Would it be possible to have "advanced parameters" also for exporting from GRASS, where for example selective export of geometry-types or layers could be choosen? Though it may be trivial to chain several v.clean steps in a Sextante model, this solution has definately some drawbacks. Because, as far as I can see from the log, there is allways export, location creation and import (including building of topology along with more or less cleaning) between two model-steps... This affects both behavior of a chain of v.clean-tools and performance... Cheers Stefan -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Running-v-clean-on-a-QGIS-vector-layer-Polygon-through-Sextante-tp5050418p5050713.html Sent from the Quantum GIS - User mailing list archive at Nabble.com. _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user